sulcus
Americannoun
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a furrow or groove.
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Anatomy. a groove or fissure, especially a fissure between two convolutions of the brain.
noun
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a linear groove, furrow, or slight depression
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any of the narrow grooves on the surface of the brain that mark the cerebral convolutions Compare fissure
Other Word Forms
Etymology
Origin of sulcus
1655–65; Latin: furrow
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
These patterns were based on sulcus depth and cortical thickness, which describe the folding of the brain surface and the thickness of the brain's outer layer.
From Science Daily • Jan. 4, 2026
"You can think about the intraparietal sulcus as having two knobs on a radio dial: one that adjusts focusing and one that adjusts filtering," Ritz said.
From Science Daily • Mar. 8, 2024
The right coronary artery proceeds along the coronary sulcus and distributes blood to the right atrium, portions of both ventricles, and the heart conduction system.
From Textbooks • Jun. 19, 2013
Located between the left and right ventricles are two additional sulci that are not as deep as the coronary sulcus.
From Textbooks • Jun. 19, 2013
It is rather robust, very much recurved and grooved by a deep vertical sulcus upon its antero-internal face.
From On The Affinities of Leptarctus primus of Leidy American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331. by Wortman, Jacob Lawson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
